I have an iso file and am trying to burn this to a blu-ray.

I have centos7 and k3b version 2.0.2 and KDE platform of 4.10.5

After loading the image, when I click on the start button, K3B is asking for a disc, it says

"Found medium: Empty BD-R medium
Please insert an empty DVD-DL medium into drive"

K3B is looking for a double layer DVD and not accepting BD (blu disc)!
Does K3B needs specific format of .iso?
I even try the official centos iso file and still not able to burn.
I can burn an individual file with no problem - seems problem is with iso file.

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If I use cdrecord command, I will get the follows;

[root@localhost dev]# cdrecord dev=/dev/sr1 -v -pad -data /home/radarop/Desktop/DVD.iso
wodim: No write mode specified.
wodim: Assuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
scsidev: '/dev/sr1'
devname: '/dev/sr1'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.11
SCSI buffer size: 64512
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'ASUS '
Identification : 'BW-12D1S-U '
Revision : 'E401'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x0041 (BD-R sequential recording)
Profile: 0x0043 (BD-RE)
Profile: 0x0042 (BD-R random recording)
Profile: 0x0041 (BD-R sequential recording) (current)
Profile: 0x0040 (BD-ROM)
Profile: 0x002B (DVD+R/DL)
Profile: 0x001A (DVD+RW)
Profile: 0x001B (DVD+R)
Profile: 0x0016 (DVD-R/DL layer jump recording)
Profile: 0x0015 (DVD-R/DL sequential recording)
Profile: 0x0013 (DVD-RW restricted overwrite)
Profile: 0x0014 (DVD-RW sequential recording)
Profile: 0x0011 (DVD-R sequential recording)
Profile: 0x0012 (DVD-RAM)
Profile: 0x0002 (Removable disk)
Profile: 0x0010 (DVD-ROM)
Profile: 0x000A (CD-RW)
Profile: 0x0009 (CD-R)
Profile: 0x0008 (CD-ROM)
Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
Driver flags : MMC-3 SWABAUDIO BURNFREE
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 2162688 = 2112 KB
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
FIFO size : 4194304 = 4096 KB
Track 01: data 4882 MB padsize: 30 KB
Total size: 5607 MB (555:30.22) = 2499767 sectors
Lout start: 5607 MB (555:32/17) = 2499767 sectors
Current Secsize: 2048
ATIP start of lead in: -150 (00:00/00)
Disk type: unknown dye (reserved id code)
Manuf. index: -1
Manufacturer: unknown (not in table)
wodim: Cannot get next writable address for 'invisible' track.
wodim: This means that we are checking recorded media.
wodim: This media cannot be written in streaming mode anymore.
wodim: If you like to write to 'preformatted' RW media, try to blank the media first.
wodim: ERROR: Could not manage to find medium size, and more than 4.3 GB of data for a non dual layer disc.
wodim: Cannot write more than remaining DVD capacity.

You need to remove wodim and install cdrtools as wodim doesn't support BD